Sam's side

"So you'll do a anything my son tells you?" Carrie asked me

"Don't really have much of a choice" I said

"Here I'll show you" Sam said. He got to his feet "can you fetch me a glass of water. I'm kind of thirsty after all that fucking"

I rolled my eyes. As I walked into the kitchen I noticed that his dick was already getting hard again. No doubt it would be fully erect by the time I got back. Sam must be loving this. Having two naked teens walking around his home.

"You know" Carrie said quietly as I searched for a glass "I always thought she was a slut" she obviously didn't realise I could still hear her "but I have to admit she is very pretty. If you guys ever get bored with her…"

"oh, I don't think we're going to get bored of her anytime soon" Sam said "but feel free to borrow her if you want. She can kind of belong to the family, you know, we can share her"

"I like the sound of that" Becky said excitedly.

Great, now I was going be used by the whole family. Images of the three of them holding me down and fucking me senseless filled my mind. I tried to push the thoughts of them gangbanging me out of my mind as I entered the room. This was difficult as Sam and Becky were still naked. Not only that but Sam was now leaning against the sofa casually touching his sister infront of their mother. They way Becky squirmed and blushed was really cute and was making me feel a little hot. It also made me wonder if she was really as confident doing this in front of Carrie as she acted. Sam's raging hard on was impossible to miss. I was right when I thought he would completely erect by the time I got back. He had it pressed up hard against his sisters ass.

"Thanks" Sam said as I handed him the glass. He took one sip from it before handing it back to me "place it on the table over there" I did as he said "good, now place one hand in the air" I did as he said "now both" i did.

"Wow" Carrie said "you really don't want people to see those photos do you?"

"No, not at all" I said still holding both hands in the air.

"okay, how about you do 5 jumping jacks" Sam said

I reluctantly obeyed. I could feel my boobs bouncing up and down each time I jumped. I noticed that with each jump Sam paid less and less attention to his sister as he watched my tits bouncing. By the time I had finished my 5th jump he had completely stopped fingering her. She was surprised at first but soon she was giving me a dirty look. It was obvious she had been close to her orgasm but my little show had distracted her brother and stopped her from getting the relief she desperately wanted. It was hardly my fault, I didn't have a choice. Still, I hope this doesn't come round to bite me in the ass.

"Alright then" Sam said as he got to his feet "how about you bend down and touch your toes"

My heart was beating fast as I leaned forward into a rather compromising pose.

"Now I want you to grab your ankles" he said

"What!?"

"You heard me" he said as he stood behind me.

I did as he said as I began to realise what he was about to do to me.